open-keychain/OpenPGP-Keychain/res/layout/stickylist_header.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <se.emilsjolander.stickylistheaders.views.UnderlineTextView
        android:id="@+id/stickylist_header_text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="start|left"
        android:padding="8dp"
        android:textColor="@color/emphasis"
        android:textSize="17sp"
        android:textStyle="bold" />

</RelativeLayout>